Erycia. 303 



fourth and fifth segment. Legs with anterodorsal bristles on hind 

 tibiæ unequal; claws and pulvilli elongated in male, or small and 

 equal in both sexes; front tarsi simple, at most slightly flattened. 

 Wings with first posterior cell open, ending rather near to or in some 

 distance from apex of wing; no costal spine. 



The species are parasitic on Rhopalocera and Heterocera, and 

 some also on Lophyrus; aurulenta belongs to Pantel's group 1 and the 

 larva takes the air through a primary hole, and the same may be 

 the case with the other species. 



About 5 European species are known; 3 occur in Denmark. 

 The genus is divided into some subgenera, viz with regard to our 

 species Erycia s. str. {fatua, vicina) and Bactromyia B. B. {aurulenta). 



Table of Species. 



1. Larger species, with four sternopleural bristles; first post- 

 erior cell ending in some distance from apex of wing; 

 posterior cross-vein near the angle 2. 



— Smaller species, with three sternopleural bristles; first 

 posterior cell ending near apex of wing ; posterior cross-vein 



nearly midway between medial cross-vein and angle .... 3. aurulenta. 



2. Ocellar bristles present; palpi yellow; greyish brown 

 pruinose species with red scutellum 1 . fatua. 



— Ocellar bristles absent; palpi dark or black; grey pruinose 



species with dark scutellum 2. vicina. 



1. E. fatua Meig. 



1824. Meig. Syst. Beschr. IV, 385, 252 {Tachina) et 1838. VII, 240, 7 

 {Masicera). — 1900. Villen. Bull. Soc. Ent. de Fr. 161 (Masicera). — 1921. 

 Baer, Zeitschr. f. angew. Ent. VII, 157. — Tachina festinans Meig. 1824. 1. c. 

 IV, 384, 251 et 1838. VII, 241, 19 (Masicera). — 1896. Pand. Rev. Entom. 

 XV, 61, 19 (Tachina). — 1900. Villen. 1. c. 161 et 1907. Ann. Soc. Ent. de Fr. 

 LXXVI, 389. — 1924. Stein, Arch. f. Naturgesch. 90, 6, 98. — Tachina furi- 

 hunda Zett. 1844. Dipt. Scand. III, 1040, 31. — 1893. B. B. Denkschr. Akad. 

 Wiss. Wien, LX, 221. (Hetnifnasicera). — Exorista properans Rond. 1859. 

 Dipt. Ital. Prodr. III, 127, 6. — Hemimasicera ferruginea 1889. B. B. (nec 

 Meig.) Denkschr. Akad. Wiss. Wien, LVI, 87, Tab. I, Fig. 11 et 1891. LVIII, 327. 



Male. Frons above about as broad as the eye. Orbits grey, 

 cheeks and jowls more silvery; frontal stripe brownish red. Ocellar 

 bristles present. Two uppermost frontal bristles reclinate. Vibrissæ 

 a little ascending. Orbits and jowls black-haired. Occiput grey with 

 whitish hairs, and a row of black hairs behind postocular bristles. 

 Antennæ black, third joint about three times as long as second; 



